Once the figures have dried off, I glue them to mdf based using PVA. The easiest and quickest way is to dunk the figure's own base in the tub of PVA, making sure the adhesive covers the base. Scrape off some of the surplus PVA on the side of the tub and press the figure on to the mdf. Don't just put a dab of glue on the bottom of the figure base - it won't be secure. The figures above are the CTS NKPA we met in the previous post.
Once the PVA has dried - I leave mine for 24-48 hours - brush on a coat of artist's gesso. This is a strange substance which artists use for sealing canvas and is available in both black and white. Having tried both I prefer the former. Be warned that despite being acrylic based, gesso is a bit smelly - so keep a window open.
Brush it on generously. When dry go over the figures again touching up bits you've missed and give a second coat to vulnerable extremities like heads, rifle barrels, bayonets and swords. These figures are MARS Soviet Motor Rifle Troopers.
When the gesso has dried we can finally crack on with the actual painting!